will mot load minecraft

---- Minecraft Crash Report ----
// I just don't know what went wrong

Time: 5/13/13 4:07 PM
Description: Exception in server tick loop

java.lang.NoSuchMethodError: aab.I()Lt;
at jc.<init>(EntityPlayerMP.java:99)
at gu.a(SourceFile:271)
at bjj.b(SourceFile:67)
at net.minecraft.server.MinecraftServer.r(SourceFile:480)
at net.minecraft.server.MinecraftServer.q(SourceFile:397)
at bjg.q(SourceFile:122)
at net.minecraft.server.MinecraftServer.run(SourceFile:331)
at gp.run(SourceFile:573)

A detailed walkthrough of the error, its code path and all known details is as follows:
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– System Details –
Details:
Minecraft Version: 1.5.2
Operating System: Windows Vista (x86) version 6.0
Java Version: 1.7.0_21, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 348544192 bytes (332 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 3803 (212968 bytes; 0 MB) allocated, 3803 (212968 bytes; 0 MB) used
Suspicious classes: [com.sijobe.spc.core.HookManager]
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
Profiler Position: N/A (disabled)
Vec3 Pool Size: 803 (44968 bytes; 0 MB) allocated, 803 (44968 bytes; 0 MB) used
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Very likely; Jar signature invalidated